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2. Flow coefficient - Wikipedia

   en.wikipedia.org/wiki/Flow_coefficient

   Flow coefficient. The flow coefficient of a device is a relative measure of its efficiency at allowing fluid flow. It describes the relationship between the pressure drop across an orifice valve or other assembly and the corresponding flow rate . Mathematically the flow coefficient Cv (or flow-capacity rating of valve) can be expressed as. where.

3. Mason's gain formula - Wikipedia

   en.wikipedia.org/wiki/Mason's_gain_formula

   Mason's gain formula. Mason's gain formula (MGF) is a method for finding the transfer function of a linear signal-flow graph (SFG). The formula was derived by Samuel Jefferson Mason, [1] for whom it is named. MGF is an alternate method to finding the transfer function algebraically by labeling each signal, writing down the equation for how that ...

4. Direct digital control - Wikipedia

   en.wikipedia.org/wiki/Direct_digital_control

   Direct digital control is the automated control of a condition or process by a digital device (computer). Direct digital control takes a centralized network-oriented approach. All instrumentation is gathered by various analog and digital converters which use the network to transport these signals to the central controller. The centralized computer then follows all of its production rules ...

5. Pulse-width modulation - Wikipedia

   en.wikipedia.org/wiki/Pulse-width_modulation

   Direct torque control is a method used to control AC motors. It is closely related with the delta modulation (see above). Motor torque and magnetic flux are estimated and these are controlled to stay within their hysteresis bands by turning on a new combination of the device's semiconductor switches each time either signal tries to deviate out ...

6. Pressure switch - Wikipedia

   en.wikipedia.org/wiki/Pressure_switch

   A pressure switch is a form of switch that operates an electrical contact when a certain set fluid pressure has been reached on its input. The switch may be designed to make contact either on pressure rise or on pressure fall. Pressure switches are widely used in industry to automatically supervise and control systems that use pressurized ...

7. High-frequency ventilation - Wikipedia

   en.wikipedia.org/wiki/High-frequency_ventilation

   High-frequency ventilation is a type of mechanical ventilation which utilizes a respiratory rate greater than four times the normal value [1] (>150 (V f) breaths per minute) and very small tidal volumes. [2] [3] High frequency ventilation is thought to reduce ventilator-associated lung injury (VALI), especially in the context of ARDS and acute ...